I did as you suggested and added the certainty value. Strange thing is that if I try the URL that I originally posted, the value does not show up. If I try another URL that should be blocked, it DOES show up!

I gotta say there is something wrong with PureSight to have ranked this web page at 72%. I finally got onto it after clearing the cache and then redirecting the browser. There is nothing here but the mention of singles once or twice.